Skip to main content

Sapphire ParaTime

Sapphire is our official confidential ParaTime providing a smart contract development environment with Ethereum Virtual Machine (EVM) compatibility.

As the official confidential EVM-compatible ParaTime on the Oasis Network, Sapphire allows for:

  • Confidential state, end-to-end encryption, confidential randomness
  • EVM compatibility
  • Easy integration with EVM-based dApps, such as DeFi, NFT, Metaverse and crypto gaming
  • Scalability: increased throughput of transactions
  • Low-cost: 99%+ lower fees than Ethereum
  • 6 second finality (1 block)
  • Cross-chain bridge to enable cross-chain interoperability (upcoming)

If you are not bound to EVM and you wish to develop dApps with more fine-grained confidentiality, check out the Cipher ParaTime.

Chain Information


  • Network name: sapphire
  • Long network name: Oasis Sapphire
  • Chain ID:
    • Hex: 0x5afe
    • Decimal: 23294


  • Network name: sapphire-testnet
  • Long network name: Oasis Sapphire Testnet
  • Chain ID:
    • Hex: 0x5aff
    • Decimal: 23295

RPC Endpoints


The RPC endpoint is a point of trust. Beside traffic rate limiting, it can also perform censorship or even a man-in-the-middle attack. If you have security considerations, we strongly recommend that you set up your own ParaTime client node and the Web3-compatible gateway.

You can connect to one of the public Web3 gateways below (in alphabetic order):

ProviderMainnet RPC URLsTestnet RPC URLsSupports Confidential Queries
Oasis Protocol Foundation

Public RPCs may have rate limits or traffic restrictions. For professional, dedicated RPC endpoints, consider the following providers (in alphabetic order):

ProviderInstructionsPricingSupports Confidential Queries

Block Explorers

Name (Provider)Mainnet URLTestnet URLEIP-3091 compatible
Oasis Explorer (Oasis Protocol Foundation)
Oasis Scan (Bit Cat)…279…f6cNo


Name (Provider)Mainnet URLTestnet URLDocumentation
Covalent API docs
Goldsky SubgraphN/AN/ADocumentation site
Oasis Nexus (Oasis Protocol Foundation)
Oasis Scan (Bit Cat) Runtime API, Testnet Runtime API
SubQuery NetworkN/AN/ASubQuery Academy, QuickStart, Starter project

If you are running your own Sapphire endpoint, a block explorer, or an indexer and wish to be added to these docs, open an issue at

See also